Joseph lewis mills



(No Model.)

J. L. MILLS.

APPARATUS FOR ENGRAVING.

No. 429,280. Patented June 3, 1890.

BIZ

qwdmeooao gww'wtoz I 3513 flf-fozmmak M UNITED STATES PATENT OFFICE.

JOSEPH LEWIS MILLS, OF BALDWINS GARDENS, GRAYS INN ROAD, COUNTY OF MIDDLESEX, ENGLAND.

APPARATUS FOR ENGRAVING.

SPECIFICATION formingpart of Letters Patent No. 429,280, dated June 3, 1890.

Application filed January 8, 1889. Serial No. 295,360. (No model.) Patented in England July 16, 1888, No. 10,295 in France January 16, 1889, No. 195,416, and in Belgium January 18,1889,N0.84,6'70.

To aZZ whom it may concern: The object of each of the nozzles or points Be it known that I, JOSEPH LEWIS MILLS, a hereinbefore mentioned being removable is, subject of the Queen ofthe United Kingdom of that it may be replaced by another nozzle Great Britain and Ireland, residing at Baldmore or less fine, according to the require- 5 wins Gardens, Grays Inn Road, in the county ments of the work in hand. The said tubes of Middlesex, in that part of the United Kinga and c are designed for and fitted at their dom aforesaid called England, have invented ends with ferrules or rings for the attachment a certain new and useful Instrument or Apof the india-rubber or other suitable pipes or paratus for Engraving and Mezzotinting, tubes for the conveyance of compressed air 10 whereby currents of compressed air or steam or steam and sand or such like, respectively,

and sand are controlled by the hand and utilto said tubes at and c ized for engraving and mezzotinting pur- In the form of my invention shown in Fig. poses; and I do hereby declare the following 2 the tube a, formed of any suitable metal or to be a full, clear, and exact description of the material, is attached to an air-pump or steamr 5 invention, which will enable others skilled in engine by an india-rubber or other suitable the art to which it appertains to make and pipe or tube a and furnished with a removause the same, reference being had to the acble nozzle or point I). It is attached by metal companying drawings,which form part of this brackets c c to the sand-tube 0 which is specification. furnished with a removable nozzle or point 20 The above-mentioned invention has not b, and is attached to the reservoir for sand been patented in any country except the fol or such like by an india-rubber or other suitlowing: England, No. 10,295, July 16, 1888; able pipe or tube 0, which is punctured over France, No. 195,416, January 16, 1889; Beland hither throughout its entire lengthby gium, No. 84,670, January 18, 1889. very fine holes, sufficient for the admission of 2 5 Figure 1 represents a side elevation ofone air from the outside, but insufficient to perform of the instrument embodying my inmit the escape of sand or such like from said vention, and Fig. 2 represents another form pipe or tube c. The aforesaid pipe or tube thereof. 0 is of a composite character, being made up In said drawings, a designates the air or of sections or parts of brass or other suitable o steam tube, which is formed of any suitable metal or material, which vary in capacity,

metal or material furnished with a removable and of two hollow globes or balls, of which the nozzle or point Z), and attached by an indiaupper or larger Z is glass, the lower and rubber or other suitable pipe or tube 0 to an smaller Z of copper or other suitable metal air-pump or steam-engine. This air-tube, as or material. Some of these sections or parts 5 shown in Fig. 1, is placed parallel to a sandcontain a pipe or tube of porcelain or enamel tube 0 formed of any suitable metal or mato facilitate the passage of the sand or suchterial, attached to a reservoir for sand or such like through the said tube 0 The globes or like by an india-rubber or other suitable pipe balls Z and Z are punctured over and hither or tube 0 and furnished with a removable by very fine holes, sufficient to admit air from 40 nozzle or point Z), and with a thumb-lever h, the outside, but insufficient to permit the esworking on a pivot 2', which lever, when decape of sand or such like from the inside 0 pressed, opens the air-valve ,7'. The spring 7c thereof, and in the top and bottom of each of acts upon the aforesaid thumb-lever h and said globes or balls and in a vertical line a keeps the aforesaid air-valve closed. The ring circular hole or orifice is made, which hole or 5 lis loosely attached to the tube a for the first orifice corresponds in circumference to the finger of the operator to enable the instrucircumference of the particular section or ment to be suspended from his hand, and thus part to which said globe or ball is attached by to leave his thumb free to act upon the aforesolder, cement, or other convenient medium. said lever h. The object of puncturing the pipe or tube 0 and interposing the punctured globes or balls Z and Z between the aforesaid sections or parts is to prevent the sand-tube c becoming congested by the sand or such like falling from the reservoir for sand and so forming a vacuum, which would impede the free flow of the sand or such like through said tube 0 in its passage to the nozzle or point 11'.

The operation is as follows: The nozzles b and I) being in proximity, the jet of air or steam issuing from the former will strike the sand falling or propelled through the other nozzle and drive it against the surface on which it is to operate. These nozzles may be moved about by hand and directed on the points which require such treatment. This instrument is especially designed to be used in my process described in application Serial No. 303,046, filed March 12, 1889. The said application describes my instrument herein set forth and claimed, but does not claim it.

Having now fully described and ascertained the nature of my said invention and in what manner the same in its several modifications is to be carried into practice, I claim-- 1. In an instrument for applying sand or other abrading substance, a tube a, a nozzle 1) thereon, a flexible pipe connecting said tube with a source of air-supply, and a sandtube having a nozzle arranged in juxtaposition to the nozzle 1) aforesaid outside of said nozzle Z), in order that the sand issuing therefrom may be struck by the blast of air at an angle as it issues from nozzle 1) and caused to impinge on the surface to be abraded, substantially as set forth.

2. The sand-tube c )rovided with perforated bulbs Z Z in combination with the pipe connecting said tube with the sand-reservoir, the nozzle Z) of said sand-tube, and an airblast pipe having a nozzle arranged to discharge against the sand issuing from the nozzle of said sand-pipe, substantially as set forth.

A perforated pipe 0', leading from the sand-reservoir, in combination with the sand tube 'to which it is attached, a nozzle on said sand-tube, tube a, provided with a nozzle discharging against the sand issuing from the nozzle of said sand-pipe, and a flexible pipe connecting said tube a with a source of airv supply, substantially as set forth.

4. The sand-tube c and air-tube a, in combination with their nozzles, their supplypipes, and the bars or braces 0 0 which connect them and hold their nozzles in juxtaposition, substantially as set forth.

In testimony whereof I have hereunto put my hand this 10th day of October, 1888.

JOSEPH LEWIS MILLS. Witnesses:

PATRICK OIIALLORAN, N. DILLON. 

